package cn.itheima_01;

import java.util.HashSet;
import java.util.Set;

public class Test_01 {
	public static void main(String[] args) {
		Set<String> set=new HashSet<String>();
		set.add("hello");
		set.add("hello");
		set.add("java");
		System.out.println(set);
		for (String string : set) {
			System.out.println(string);
		}
	}

}
